You could always just get the proper equipment instead of jury-rigging your door:
http://www.new-garage-door-parts.com...r-monitor.html

"Lord Possum" wrote in message news:PrbXb.28906$jk2.68337@attbi_s53...
Is such a thing made? I know you can buy 12vdc bulbs for backup lights
on your car which ding-ding as a backup warning. But, I want some simple
screw-in thingie which will audibly warn me to close the $&^%* garage
door instead of leaving it up all night for the possums and cats to get in.


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